Assessment of salinity tolerance and trait associations in Indian mustard (Brassica juncea L.) under controlled salt stress conditions
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Authors
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Ankit Dhillon
Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar-125 004, Haryana, India
Author
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Neeraj Kumar
Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar-125 004, Haryana, India
Author
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Ram Avtar
Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar-125 004, Haryana, India
Author
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Amit Sharma
Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar-125 004, Haryana, India
Author
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Shreya
Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar-125 004, Haryana, India
Author
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Vishal Saini
Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar-125 004, Haryana, India
Author
Keywords:
Brassica juncea L., correlation and path analysis, genetic variability, salinity tolerance, seedling stageAbstract
Salinity poses a significant challenge to the cultivation of Indian mustard, especially during the seedling stage in saltaffected
regions. One promising approach to overcome this limitation is the development of salt-tolerant varieties
through plant breeding, supported by germplasm screening and genetic variability analysis. This study aimed to
evaluate salinity tolerance and investigate the genetic variability among 48 Indian mustard genotypes at the seedling
stage. The genotypes were grown in a greenhouse under controlled conditions and exposed to two levels of salt stress
(8 dSm-1 and 12 dSm-1). Correlation analysis under controlled conditions showed significant positive correlation between
shoot length and seedling dry weight, seedling length and seedling dry weight, shoot fresh weight and seedling dry
weight, root fresh weight and seedling dry weight at 5 per cent level of significance. Path analysis under controlled
conditions showed that seedling length has the maximum positive direct effect on seedling dry weight followed by root
fresh weight then followed by germination, shoot fresh weight and seedling fresh weight. Under both salinity treatments,
significant positive correlations were observed among most growth and biomass traits, whereas germination percentage
was not significantly correlated with the other measured traits.
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